Means for removing asphalt paving.



PATENTED AUGi 14, 1906.

J. GAMMIE. MEANS FOR REMOVING ASPHALT PAVING.

AIPLICATION FILED NOV, 23, 1905.

2 SHEETS-SHEET 1.

W WM y a; MAJ:

No. 828,734. I PATENTBD AUG. 14, 1906 J. GAMMIE.

MEANS FOR REMOVING ASPHALT PAVING. APPLIOATIONTILED ov. 23, 1905.

' 2 SHEETS-SHEET 2 Smm j JOHN GAlt lrtfliifl, OF NEW YORK, N. Y.

no. sze zaa.

Specification of Letters Patent.

Fatented Aug. 14:, 1906.

A li ti fil d Ilovembei 23.1906. Serial No. 288,700.

To (1.7] whom it may .cmntccwt:

Be it known that l, Jone? Gamma, a citizen of the United States, residing, in the borough of islanhattan, city, county, and State of New York, have invented certain new and useful improvements in Means for Removing Asphalt Paving, of which the following is a specification.

My invention is designed to facilitate the opening up and removal of asphalt paving when it is desired to make an. excavation for any purpose, as set forth in Letters Patent issued. tome August 1, 190.", No. 795,905.

The invei'ition consists, primarily, in arranging, in conjunction with the saws therein set forth, means for raising and detaching the asphalt within the lines prescribed by the saws substantially as hereinafter set forth; and, secondarily, the invention consists in the. specific cimstruction and arrangement of parts, as herein described and claimed.

in the accompanying drawings, Figure 1 is a rear elevation of a vehicle upon, which my improved mechanism is mounted. Fig. 2 is a plan of the same. Fig. 3 is a vertical sec-- tional detail of the lower end of the rack bar bracket or extension it, taken in a trans verse plane orat right angles to Figs. 5, and (i. Fig. 41 is an elevation of th rear end of the vehicle, one of the saws being broken away and the pavement being also broken away and shown in section in the piano co inciding with the central saw and plow for the purpose of more clearly illustrating the action of the latter. Fig. 5 is a similar View illustrating the rocking of the plow. Fig. 6 is a detail view showing the support for the plow rock-lover. Fig. 7 is a horizontal section upon plane of line 7 7, Fig. 4.

A represents the rear portion of the frame of tllovehiclc, such as that designated in my .licttcrs Patent heroinbefore referred to, said vehicle being supplied with a motor and connections for driving the saw-shaft S, the driving-chain s being shown as broken away in the drawings, as is also the chain 1), which engages with the pulley 1) upon the shaft 1), which forms the axle for the rear Wheels B, the said pulley b and driving-chain i) being shown in Figs. 1 and 2, but omitted in Figs. 4 and 5 for sake of clearncss.

'lhe saw-shaft S is mounted and adjusted upon. the frame A substantially as set forth in my patent hereinhefore referred to. Thus in the drawings the journals of the shaft S are shown as mounted. in journal-boxes a, which rest between vertical ways a in the frame A, the shaft journal-boxes a a, &c., being raised and lowered by means of a vertical rack-bar ii, the lower end of which clasps the shaft S centrally and the upper end of which is supported by and between gears p p, mounted in oearings on the cross-bar a of the frame A, said gears being actuated and controlled by the pinion t engaging with one of them, the rhaft of the. pinion being prm/ided with. a crank 1'. and with a ratchet-wheel t for engagement with a sustaining-pawl t By this or equivalent means the shaft S and saws may be conveniently raised, lowered, or adjusted to effect any desired degree of out. By this arrangement while the downward movement )f the shaft S and saws s s is prescribed and limited by the pawl t" and ratchet {2 their upward movement is unrestricted, so thst in. case of exceptional resistance to the action of the saws they are enabled to yield vertically, and thereby obviate damage.

.liigidly secured to the rack-bar ii is a rear extension or bracket R, the lower portion of which is formed wil h guideways 'r' 1', upon and bet veen which rests a flanged block Q, carryhu; a stud or trunnion (1, upon which is pivotally supported a rock-lever l The block Q re its upon an adjustable stop at the bottom of the arm or bracket it and held against said stop (1 normally by a spring (f, interoosed between the block Q, and the shoulder (1 upon the bracket it. As shown in the acmnnpanying drawings, the adjustable stop 1 consists of a set-screw, although it is obvious that any other mechanical expedient may be substituted with like result.

The lower end of the rock-lever P is formed with a plowshare p, and the upper end of the rock-lever is connected with a spring p, which tends constantly to hold the roller 17* on said lever in contact with the earn 7', which is mounted upon a stud projecting from the side of the bracke it and is formed 'With a pinion r for engagement with a sprocket-chain I), passing over the sprocketwheel I)" on the shaft 1)", as shown by way of illustration in the drawings, since it is obvious that the cam r and pinion 7" may be driven in any other su table or convenient manner as may be "found most expedient. The cam 1" is formed with one or more eccentric portions 1", which tilt the upper end of the rock-lever i? backward, and hence, raise the point of the plowsharein furrow, theretakin 'of the ran by loosening and raising the'furrow-slices, as 1ndioated approximately in Fig .-5. A'preferable combination parts is to are one such plow behind a saw .9 interme iate between two adjoinin saws s s,, as

shown, so that the plowwill ollow the line oFseyeranoe created by said'preceding inter-- mediate/saw s, creatinga double furrow, or, in other words, raising a furrow-slice ,on either side, the width of each slice being governed b the prescribed lines of severance formed y the adjacent saws, asindicated in Fig. .1. This arrangement. may be duplicated as often. as maybe fou'nd expedient in practice, the combination in the drawings showing the essential features of the inventlon, and for that matter, if desired, a] plow may obviousl "be arranged in conjunction with and to 0 low each saw,

It will be noted that the plow while pargeneral adjustment of the frame Aan saws-s s" is also independently adjustableby means of the adjustable stop or rest q, so thatdts depth of penetration may be regulated with accuracy according to work to be accomplished. Furthermore, while it is sustained at a prescribed level by the adjustable stop q the spring g allows it to'yield vertically and accommodate itself to irregularities in the foundation on which the asphalt is laid, thereby obviating the danger of breakage to which the/parts would be subjectedif the rock-lever were mounted on a rigid bearing. 1

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In as halt-cutting apparatus, the combination o a rotatable sawshaft carrying a plurality of saws and mounted for free movement vertically. upward but restricted as to downward movement, and a plow arranged j to detach and raise the asphalt between the lines prescribed by the saws for the purpose descri ed. p

2-. In as halt-cutting apparatus, the combination o a rotatable Saw-shaft carrying aplurality of saws and mounted for free movement vertically upward but restricted as to downward movement, a low arranged to detach and raise the aspha t between the lines rescribed by the saws, and-"means-for adv usting said' plow vertically and independent of the saws for the purpose described.

3; In as halt-cutting apparatus, the com- 'tegra bination o a rotatable saw-shaft carrying a plurality of saws and. mounted for free movement vertically upwardbut restricted. as to downward movement, a low arranged to detach and raise the aspha t between the lines prescribed by the saws, a rock-lever integral I with said low, and means for rocking said lever, for t e purpose described.

4. In asphalt-cutting apparatus, the combination of a rotatable saw-shaft carrying a.

plurality of saws and mounted for free moVement vertically, upward but restricted as to downward movement, a low arranged to de- 1 taoh and raise the aspha t between the lines prescribed by the saws, a rock-lever integral with saidfplow, andfmeans jor automatically rocking said lever, for the purpose described.

5. In as halt-cutting apparatus, the combination o a rotatable saw-shaftcarrying a plurality of saws and mounted forfree moveinent vertically upward but restricted as to r downward movement, and a .plow arranged to detach and raise the asphalt, between the lines prescribed by the saws, a rock-lever integral with said plow and v ported upon a bearing whic is vertica adjustable for the purpose described.

6. In as halt-cutting apparatus, the com- 7. In asphalt-cutting apparatus, the com-1 bination o a rotatable saw-shaft carrying a plurality of saws and mounted for free moveivotally su ll y ment vertically upward but restricted as to, downward movement, and a low arranged to detach and raise the aspha t between the lines prescribed by the saws, a rock-lever integral with said plow and pivotally supported upon a bearing which rests between vertical ways, an adjustable rest underneath said bearing and a spring interposed between the top of said. bearing and a stationary part for the purpose described.

JOHN GAMMIE.

Witnesses:

I). W. GARDNER, GEO. WM. Murr. 

